<template>
  <view class="wrapper">
    <SearchBar @search="toSearchList"/>
    <view class="history-search">
      <view class="title">
        <text class="title">历史搜索</text>
        <icon type="clear"
              size="18" @click="clearHistory">
        </icon>
      </view>
      <view>
        <view v-for="(item,index) in keywordList" :key="index" @click="toSearchList(item)">{{item}}</view>
      </view>
    </view>
  </view>
</template>

<script>
import SearchBar from '../../components/SearchBar'

const KEYWORD_LIST = 'keyword_list'
export default {
  components: {
    SearchBar
  },
	data(){
		return{
			// 把storage里面历史搜索同步到data属性
			keywordList:[]
		}
	},
	// 搜索列表页面返回搜索页面，页面初始化时也会执行
	onShow(){
		this.keywordList = uni.getStorageSync(KEYWORD_LIST)||[]
	},
	// 搜索页面跳转搜索列表页之前
	// onHide(){
	// 	this.keywordList = uni.getStorageSync(KEYWORD_LIST)
	// },
	methods:{
		// 清空历史搜索
		clearHistory(){
			uni.showModal({
				content:'你确定要清空历史搜索吗？',
				success:res=>{
					// console.log(res)
					// 用户确定了
					if(res.confirm){
						// 清空界面
						this.keywordList =[]
						// 清空存储
						uni.removeStorageSync(KEYWORD_LIST)
					}
				}
			})
		},
		// 跳转到搜索列表页
		toSearchList(inputVal){
			// 头部插入,去重
			let _keywordList = [inputVal,...this.keywordList]
			_keywordList = [...new Set(_keywordList)]
			
			// 存storage
			uni.setStorageSync(KEYWORD_LIST,_keywordList)
			uni.navigateTo({
				url:'/pages/search_list/search_list?keyword='+inputVal
			})
		}
	}
}
</script>

<style lang="less">
.search {
  background-color: #eee;
  padding: 30rpx 15rpx;
  display: flex;
  justify-content: space-between;
  font-size: 28rpx;
  position: relative;
  icon {
    position: absolute;
    top: 50rpx;
    left: 38rpx;
  }
  input {
    height: 60rpx;
    flex: 1;
    background-color: #fff;
    padding-left: 70rpx;
    box-sizing: border-box;
    border-radius: 4rpx;
  }
  button {
    width: 160rpx;
    height: 60rpx;
    line-height: 60rpx;
    border-radius: 8rpx;
    font-size: 28rpx;
    border: 1rpx solid #bfbfbf;
    background-color: #eee;
    margin-left: 20rpx;
  }
}

.history-search {
  color: #333;
  font-size: 28rpx;
  padding: 30rpx 30rpx 30rpx 15rpx;
  .title {
    display: flex;
    justify-content: space-between;
  }

  view {
    display: flex;
    flex-wrap: wrap;
    margin-top: 30rpx;
    view {
      height: 64rpx;
      line-height: 64rpx;
      padding: 0 26rpx;
      background-color: #ddd;
      margin: 0 30rpx 16rpx 0;
    }
  }
}
</style>